Variable Interest Entities (VIEs) (Details) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2021 MW	Sep. 30, 2021 USD ($) variable_interest_entity mi MW	Dec. 31, 2020 USD ($)
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		$ 139,163	$ 127,684
Carrying amount of liabilities, consolidated variable interest entity		94,437	82,755
Investment in equity method investees		$ 5,942	5,728
NEER Segment
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity		43
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities		$ 4,273	3,704
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		556	423
Carrying amount of liabilities, consolidated variable interest entity		$ 77	68
Electricity Transmission Line (in miles) | mi		280
Percentage of profits and losses		50.00%
FPL [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		$ 75,245	71,001	[1]
Carrying amount of liabilities, consolidated variable interest entity		42,166	41,773	[1]
FPL [Member] | Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities		$ 3,570	3,124
NextEra Energy Resources [Member] | Variable Interest Entities Gas And Oil Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity		2
Carrying amount of assets, consolidated variable interest entity		$ 174	188
Carrying amount of liabilities, consolidated variable interest entity		$ 26	22
Natural gas and or oil electric generating facility capacity (in megawatts) | MW		1,450
NextEra Energy Resources [Member] | Variable Interest Entities Wind and Solar Primary Beneficiary [Member] [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity		36
Carrying amount of assets, consolidated variable interest entity		$ 16,779	16,180
Carrying amount of liabilities, consolidated variable interest entity		$ 1,009	1,741
Wind electric generating facility capability (in megawatts) | MW		10,478
Solar generating facility capability (in MW) | MW		763
NextEra Energy Resources [Member] | Variable Interest Entities Wind and Solar Primary Beneficiary [Member] [Member] | Forecast [Member]
Variable Interest Entity [Line Items]
Wind electric generating facility capability (in megawatts) | MW	80
Solar generating facility capability (in MW) | MW	590
NextEra Energy Resources [Member] | Variable Interest Entities Wind and Solar PV Facilities [Member[
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		$ 1,528	1,572
Carrying amount of liabilities, consolidated variable interest entity		$ 81	393
Ownership percentage		10.00%
Wind electric generating facility capability (in megawatts) | MW		400
Solar generating facility capability (in MW) | MW		599
Indirect Subsidiary of NextEra Energy Resources [Member] | Photovoltaic Solar Facility [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity		3
Carrying amount of assets, consolidated variable interest entity		$ 1,015	751
Carrying amount of liabilities, consolidated variable interest entity		$ 570	607
Ownership percentage		50.00%
Number of entities with ownership interest contributed | variable_interest_entity		5
Solar generating facility capability (in MW) | MW		409
Other Investments [Member] | Subsidiaries of NEE [Member]
Variable Interest Entity [Line Items]
Investment in equity method investees		$ 4,071	$ 3,932
Additions to investments in equity method investees		$ 85

[1] Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 5 – Merger of FPL and Gulf Power Company.